Load Combinations: AS/NZS 1170:2002

In Australia and New Zealand, the suitable standard for the combination of actions (load combinations) is AS/NZS 1170:2002. The focus of this standard is to provide structural designers with representations of the values for structural design actions. The code is split into 6 parts,

Part 0: General Principals

Part 1: Permanent, imposed and other actions

Part 2: Wind Actions

Part 3: Snow and ice actions

Part 4: Earthquake Loads

Part 5: Earthquake actions – New Zealand

This article will focus on how SkyCiv’s auto generated load combinations feature meets the load combination equations as specified in AS/NZS 1170:2002.

The actions 4.2.3 relate to snow, liquid pressure, water and earth pressure effects.

4.3 Combination of Actions for Serviceability Limit States

Appropriate combinations may include one or a number of the values for permanent, short term imposed action, long term imposed action, wind, earthquake or other serviceability values of other actions as necessary.

SkyCiv Equation

SkyCiv Comment

G + ψ0,1QL

SLS Permanent and Short-term Imposed

G + ψ1QL

SLS Permanent and Long-term Imposed

Example: All Load Types Assigned

Whilst not practical, 12 load groups have been created and assigned to all 12 load types as seen below. This is done to check the equations that are formed from the load combinations